The Short Answer
- Use WebP as your default modern format for most websites.
- Keep JPG as a fallback for email clients and older systems.
- Try AVIF when you control the stack and want maximum compression.
- Keep PNG for logos, icons, and graphics that need sharp edges or transparency.
Why Format Choice Matters
Images are often the heaviest part of a page. A 2 MB hero photo can delay Largest Contentful Paint more than your CSS and JavaScript combined. The right format cuts bytes without an obvious quality drop — which means faster pages, better Core Web Vitals, and fewer “file too large” upload failures.
When you want files to experiment with, use our free Sample Files (JPG, PNG, WebP, AVIF, HEIC) and convert them yourself so you can compare real sizes on your machine.
Format Comparison in Plain Language
JPG
Universal support. Ideal for photographs. Not great for text screenshots or transparency. Still the safest “everyone can open this” format for email and older portals.
PNG
Lossless and supports transparency. Files get large for photos — reserve PNG for UI graphics, logos, and cutouts.
WebP
Typically 25–35% smaller than JPG at similar quality. Supported in all modern browsers. Excellent everyday choice when you ship a blog, store, or landing page.
AVIF
Often smaller than WebP for complex photos. Encode time is slower and some design tools still struggle. Great when you can serve a picture element with a JPG fallback.
How to Convert Safely
- Start from a high-quality original (not an already crushed JPG).
- Use Image Converter to switch formats, or dedicated pages like JPG to WebP and WebP to JPG.
- Visually check faces, gradients, and fine text at 100% zoom.
- Run Image Compressor if you still need a hard size target (100 KB / 200 KB forms).
Related Tools
- Compress Images
- HEIC to JPG — prepare phone photos before web export
- Favicon Generator — create site icons from a master PNG
- Sample Files — download real test images by format